Thank you for your feedback. We're sorry to hear that you experienced issues with the Tucana Lifetime Prepaid Data eSIM while traveling in Antigua, St Lucia, and Barbados.
In checking your line, we see that it subscribes Tucana bundle which has no coverage in your mentioned areas. To check the full covered list of your plan, please go to https://myaccount.keepgo.com/, at the Line's managing panel in your account, choose the Line ID> More Details> Coverage or Tucana Lifetime Prepaid Data eSIM > scroll down to 'Countries and Networks'.
If there's anything else we could help with, please let us know.
Best regards,